Compatible with Sennheiser HD660s 2, HD 600, HD 660s, HD 650 case. - Compatible with Sennheiser RS 175 RF, HPM1000 case. - Compatible with Sennheiser HD 490 PRO Plus case. - Compatible with Sennheiser HD 599SE, HD 599, HD 598CS, HD 579, HD 569, HD 560S, HD 559 case.
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